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iwonahahn committed Mar 1, 2021
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"steps": [
{
"title": "Introduction",
"description": "### Database Functions in CDS Models\n\nIn this tour, you will learn how to add database-specific funtions to CDS models in your application."
"description": "### Database Functions in CDS Models\n\nIn this tour, you'll learn how to add database-specific functions to CDS models in your application."
},
{
"file": "bookshop/db/schema.cds",
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},
{
"file": "bookshop/srv/admin-service.cds",
"description": "This is how the `Authors` entity gets exposed in an OData or REST service.\n\nIn the next step you will see how we extend this projection.",
"description": "This is how the `Authors` entity gets exposed in an OData or REST service.\n\nIn the next step, you'll see how we extend this projection.",
"selection": {
"start": {
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},
{
"file": "fiori/db/sqlite/index.cds",
"description": "#### SQLite implementation\n\nHere is the first implementation for SQLite. It computes the two fields `age` and `lifetime` through SQLite's [strftime](https://sqlite.org/lang_datefunc.html) function.\n\nThrough the [`extend projection`](https://cap.cloud.sap/docs/cds/cdl#extend-view) clause you can add additional fields to projection entities. These are deployed as database views, which is why we can integrate the database functions in the first place.\n",
"description": "#### SQLite Implementation\n\nHere's the first implementation for SQLite. It computes the two fields `age` and `lifetime` through SQLite's [strftime](https://sqlite.org/lang_datefunc.html) function.\n\nThrough the [`extend projection`](https://cap.cloud.sap/docs/cds/cdl#extend-view) clause you can add additional fields to projection entities. These are deployed as database views, which is why we can integrate the database functions in the first place.\n",
"selection": {
"start": {
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},
{
"file": "fiori/db/hana/index.cds",
"description": "#### SAP HANA Implementation\n\nThis is the second implementation for SAP HANA. It computes the same two fields `age` and `lifetime` through the [YEARS_BETWEEN](https://help.sap.com/viewer/7c78579ce9b14a669c1f3295b0d8ca16/Cloud/en-US/7c0d2c161ea34def86de3f5eadd6a0af.html) and [YEAR](https://help.sap.com/viewer/7c78579ce9b14a669c1f3295b0d8ca16/Cloud/en-US/20f5fac6751910148dabd3c6821f907d.html) functions of SAP HANA.\n\n#### File Layout and Code Structure\n\nNote the path of the `.cds` file we are in: it's in a subfolder of `db`, so that it's _not_ automatically picked up when we start the application. The same is true for the SQLite implementation: it's in a separate `db/sqlite/`\nfolder as well. In the next step you will see how these files are loaded.\n\nAlso, we choose to implement all of that as extension of the original bookshop here in the _fiori_ package. See the first [CAP Samples] code tour for more on the different packages of this reposiory.",
"description": "#### SAP HANA Implementation\n\nThis is the second implementation for SAP HANA. It computes the same two fields `age` and `lifetime` through the [YEARS_BETWEEN](https://help.sap.com/viewer/7c78579ce9b14a669c1f3295b0d8ca16/Cloud/en-US/7c0d2c161ea34def86de3f5eadd6a0af.html) and [YEAR](https://help.sap.com/viewer/7c78579ce9b14a669c1f3295b0d8ca16/Cloud/en-US/20f5fac6751910148dabd3c6821f907d.html) functions of SAP HANA.\n\n#### File Layout and Code Structure\n\nNote the path of the `.cds` file we are in: it's in a subfolder of `db`, so that it's _not_ automatically picked up when we start the application. The same is true for the SQLite implementation: it's in a separate `db/sqlite/` folder as well. In the next step, you'll see how these files are loaded.\n\nAlso, we choose to implement all of that as an extension of the original bookshop here in the _fiori_ package. See the first [CAP Samples] code tour for more details on the different packages of this repository.",
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},
{
"file": "fiori/package.json",
"description": "#### Run with SQLite\n\nTo run with `development` and an in-memory SQLite database, you don'y need to do anything special, because it's activated by default. Just run:\n\n>> cds watch fiori\n\nThen open http://localhost:4004/admin/Authors to see the two new fields.\n",
"description": "#### Run with SQLite\n\nTo run with `development` and an in-memory SQLite database, you don't need to do anything special, because it's activated by default. Just run:\n\n>> cds watch fiori\n\nThen open [http://localhost:4004/admin/Authors](http://localhost:4004/admin/Authors) to see the two new fields.\n",
"line": 28,
"title": "Run with SQLite"
},
{
"file": "fiori/package.json",
"description": "#### Deploy the CDS Model to SAP HANA:\n\nTo 'activate' SAP HANA through the `production` profile, you can use the global `--production` flag:\n\n>> cd fiori; cds deploy --to hana --production\n\n[Learn more about SAP HANA deployment](https://cap.cloud.sap/docs/guides/databases#get-hana)\n\n#### Run the Application\n\n>> cd fiori; cds watch --production\n\nThe service on http://localhost:4004/admin/Authors is the same as before, but this time the `Authors` entity is backed by a database view with an SAP HANA function.\n\n#### More\nIf you don't see data, you can add some in the next step.",
"description": "#### Deploy the CDS Model to SAP HANA\n\nTo 'activate' SAP HANA through the `production` profile, you can use the global `--production` flag:\n\n>> cd fiori; cds deploy --to hana --production\n\n[Learn more about SAP HANA deployment](https://cap.cloud.sap/docs/guides/databases#get-hana)\n\n#### Run the Application\n\n>> cd fiori; cds watch --production\n\nThe service on [http://localhost:4004/admin/Authors](http://localhost:4004/admin/Authors) is the same as before, but this time the `Authors` entity is backed by a database view with an SAP HANA function.\n\n#### More\n\nIf you don't see data, you can add some in the next step.",
"line": 31,
"title": "Run with SAP HANA"
},
{
"file": "fiori/test/requests.http",
"description": "### Add More Data\n\nOptionally you may add some `Authors` data by clicking on the _Send Request_ link (provided by the [REST client](https://marketplace.visualstudio.com/items?itemName=humao.rest-client) extension).",
"description": "### Add More Data\n\nOptionally you can add some `Authors` data by clicking on the _Send Request_ link (provided by the [REST client](https://marketplace.visualstudio.com/items?itemName=humao.rest-client) extension).",
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"selection": {
"start": {
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