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C++: Add the beginnings of overlay support #20874

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C++: Add the beginnings of overlay support #20874

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42f0ce7
C++: Enable overlay compilation
igfoo Nov 14, 2025
d539930
C++: Add `databaseMetadata` and `overlayChangedFiles` tables to dbscheme
igfoo Nov 19, 2025
c2f96b9
C++: Update stats
igfoo Nov 21, 2025
6c7370e
C++: Add up/downgrade scripts
igfoo Nov 21, 2025
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2,469 changes: 2,469 additions & 0 deletions cpp/downgrades/a42ce5fc943254097f85471b94ae2247e819104a/old.dbscheme
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2,450 changes: 2,450 additions & 0 deletions cpp/downgrades/a42ce5fc943254097f85471b94ae2247e819104a/semmlecode.dbscheme
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4 changes: 4 additions & 0 deletions cpp/downgrades/a42ce5fc943254097f85471b94ae2247e819104a/upgrade.properties
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
description: Add databaseMetadata and overlayChangedFiles relations
compatibility: full
databaseMetadata.rel: delete
overlayChangedFiles.rel: delete
1 change: 1 addition & 0 deletions cpp/ql/lib/qlpack.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -21,3 +21,4 @@ dataExtensions:
- ext/deallocation/*.model.yml
- ext/allocation/*.model.yml
warnOnImplicitThis: true
compileForOverlayEval: true
19 changes: 19 additions & 0 deletions cpp/ql/lib/semmlecode.cpp.dbscheme
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@

/*- Compilations -*/

/**
Expand Down Expand Up @@ -2378,6 +2379,24 @@ link_parent(
int link_target : @link_target ref
);

/**
* The CLI will automatically emit applicable tuples for this table,
* such as `databaseMetadata("isOverlay", "true")` when building an
* overlay database.
*/
databaseMetadata(
string metadataKey: string ref,
string value: string ref
);

/**
* The CLI will automatically emit tuples for each new/modified/deleted file
* when building an overlay database.
*/
overlayChangedFiles(
string path: string ref
);

/*- XML Files -*/

xmlEncoding(
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